Patient rehabilitation exercise equipment

Abstract

The invention relates to the technical field of postoperative rehabilitation, in particular to patient rehabilitation exercise equipment which comprises a walking stick body and a circular-truncated-cone-shaped supporting component, a shoulder rest used for supporting a patient is fixed to the top of the walking stick body, and an inner threaded pipe is detachably connected to the bottom of the walking stick body through a connecting structure; a sliding rod is coaxially and fixedly connected to the bottom of the inner threaded pipe, a circular-ring-shaped end cover is arranged on the sliding rod in a sleeving mode, and the end cover is in sliding fit with the sliding rod; the patient rehabilitation exercise equipment is suitable for being used in the outdoor environment with insufficient ground strength, a conical head is pressed through a supporting spring so that the ground strength can be detected, and when it is detected that the ground strength is insufficient and the risk that a walking stick falls into the ground exists, a baffle on a supporting component can be automatically unfolded; the contact area of the crutch and the ground is increased, so that the patient is prevented from falling down due to pause caused by the crutch falling into the ground.

Description

Technical Field

[0001] The invention relates to the technical field of postoperative rehabilitation, and in particular to a patient rehabilitation exercise device. Background Art

[0002] In the process of orthopedic treatment, orthopedic rehabilitation is a very important step to avoid a series of limb dysfunctions such as joint mobility disorders, muscle weakness, and activity pain.

[0003] For subjects undergoing orthopedic rehabilitation, in the early stages of rehabilitation, they need to gradually get rid of external assistance and achieve independent activities; the external assistance mentioned here mainly refers to the accompaniment of medical workers. Therefore, for patients with leg disabilities, the use of tools such as crutches is a more common method. However, the existing crutches have poor adaptability to the environment during actual use. Since the relatively open natural environment outdoors can relieve the negative emotions caused by pain, some patients will be accompanied by medical staff or relatives and family members to carry out activities in environments such as lawns and green spaces. When the existing crutches are used in such environments where the ground strength is insufficient, there is a problem of the crutches sinking into the ground, affecting the patient's experience. Summary of the invention

[0004] The purpose of the present invention is to solve the defect in the prior art that the crutch is easy to sink into the ground when used in an environment with insufficient ground strength, and to propose a patient rehabilitation exercise device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A patient rehabilitation exercise device is designed, comprising a crutch body and a truncated cone-shaped support component, wherein:

[0007] A shoulder support for supporting the patient is fixed on the top of the stick body, an internal threaded tube is detachably connected to the bottom of the stick body through a connecting structure, a sliding rod is coaxially fixed to the bottom of the internal threaded tube, a circular end cap is sleeved on the sliding rod, and the end cap is slidably matched with the sliding rod;

[0008] The support member is arranged vertically, with the end with a smaller area at the top and the end with a larger area at the bottom, wherein:

[0009] A first blind hole is axially opened on the upper end surface of the support component, the end cover is threadedly fitted in the first blind hole, the bottom end of the slide rod extends into the first blind hole, a turntable is rotatably installed at the bottom end of the slide rod, and a plurality of vertically arranged compression springs are distributed circumferentially in the first blind hole, one end of the compression spring is fixedly connected to the bottom surface of the turntable, and the other end is fixedly connected to the bottom surface inside the first blind hole;

[0010] A second blind hole is axially opened on the lower end surface of the support component, a guide tube is fixedly connected in the second blind hole, the top of the guide tube is connected with the first blind hole, a conical cone head is slidably fitted in the guide tube, the small end of the cone head faces downward, a support spring is fixedly connected to the top of the cone head, and the top of the support spring is fixedly connected to the bottom surface of the turntable;

[0011] A plurality of grooves are provided on the curved surface of the supporting component along the generatrix direction, a plurality of baffles whose shapes match the grooves are placed inside the grooves, a sliding shaft is fixedly connected to the top of the baffle, and guide grooves are provided on the two side walls inside the groove along the generatrix direction, both ends of the sliding shaft slide in the guide grooves, and when the cone head slides down in the conduit under the action of the elastic force of the supporting spring, the cone head drives the baffle to rotate through the transmission structure and causes the sliding shaft to slide down in the guide groove.

[0012] Preferably, a circular anti-skid washer is fixedly connected to the lower end surface of the support component, and the inner diameter of the anti-skid washer is not less than the diameter of the cone head.

[0013] Preferably, when the support spring is in a natural state, the bottom of the cone head is higher than the bottom surface of the anti-slip washer.

[0014] Preferably, the connection structure includes an externally threaded tube sleeved on the bottom end of the rod body, the externally threaded tube is threadedly fitted in the internally threaded tube, a plurality of hexagon socket bolts are radially threadedly connected at the top of the externally threaded tube, and the ends of the hexagon socket bolts extend into the interior of the externally threaded tube.

[0015] Preferably, the transmission structure corresponds to the baffle plate one by one, and the transmission structure includes a torque gear with a large diameter and a transmission gear with a small diameter. Both the torque gear and the transmission gear are rotatably installed in the second blind hole, and the torque gear and the transmission gear match each other. A through hole is radially opened on the hole wall of the second blind hole, and a driven rack is slidably fitted in the through hole. The driven rack matches the transmission gear. One end of the driven rack is hinged on the baffle plate to drive the baffle plate to rotate, and an active rack is vertically fixed on the cone head, and the active rack matches the torque gear.

[0016] Preferably, a driving structure is provided in the supporting component for rotating the internally threaded tube so that the internally threaded tube can be lifted and lowered on the externally threaded tube, and the driving structure includes an internal spline tube and a connecting shaft, wherein:

[0017] The inner spline tube is rotatably installed in the first blind hole, a ring gear is fixedly connected to the outer wall of the inner spline tube, an outer spline tube is slidably matched inside the inner spline tube, and the outer spline tube is fixedly connected to the slide rod;

[0018] The connecting shaft is rotatably installed on the bottom surface of the first blind hole, a driving gear is fixedly connected to the top of the connecting shaft, the driving gear matches the ring gear, the bottom end of the connecting shaft vertically extends into the second blind hole, a worm wheel is fixedly connected to the bottom end of the connecting shaft, a worm is coaxially fixedly connected to the transmission gear, and the worm wheel matches the worm wheel.

[0019] The patient rehabilitation exercise equipment proposed by the present invention has the beneficial effect that: the patient rehabilitation exercise equipment provided by the present invention is suitable for use in an environment where the outdoor ground strength is insufficient, and the strength of the ground is detected by applying pressure to the cone head through a support spring. When it is detected that the ground strength is insufficient and there is a risk of the crutch sinking into the ground, the baffle on the support component will automatically unfold to increase the contact area between the crutch and the ground, thereby preventing the crutch from sinking into the ground and causing the patient to fall. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a patient rehabilitation exercise device proposed by the present invention.

[0021] Figure 2 A patient rehabilitation exercise device proposed by the present invention Figure 1 Enlarged view of point A in the middle.

[0022] Figure 3 This is a schematic structural diagram of the cooperation between a stick body and an externally threaded tube of a patient rehabilitation exercise device proposed by the present invention.

[0023] Figure 4 This is a schematic structural diagram of a support component of a patient rehabilitation exercise device proposed by the present invention.

[0024] Figure 5 A patient rehabilitation exercise device proposed by the present invention Figure 4 Top view of the .

[0025] Figure 6 A patient rehabilitation exercise device proposed by the present invention Figure 5 AA section view.

[0026] Figure 7 A patient rehabilitation exercise device proposed by the present invention Figure 5 Middle BB section.

[0027] Figure 8 This is a schematic diagram of the internal structure of a support component of a patient rehabilitation exercise device proposed by the present invention.

[0028] Fig. 9 This is a schematic diagram of the structure inside an inner spline tube of a patient rehabilitation exercise device proposed by the present invention.

[0029] Fig.10 This is a schematic structural diagram of the cooperation between an outer spline tube and an inner spline tube of a patient rehabilitation exercise device proposed by the present invention.

[0030] Fig.11 A schematic diagram of the structure of a support component of a patient rehabilitation exercise device proposed by the present invention Figure 1 .

[0031] Fig.12 A schematic diagram of the structure of a support component of a patient rehabilitation exercise device proposed by the present invention Figure 2 .

[0032] Fig.13 This is a schematic diagram of the structure of a driving structure of a patient rehabilitation exercise device proposed by the present invention.

[0033] In the figure: 1, shoulder rest; 2, stick body; 3, external threaded pipe; 301, hexagon socket bolt; 4, internal threaded pipe; 5, sliding rod; 6, end cover; 7, supporting component; 701, guide groove; 702, first blind hole; 703, guide tube; 704, second blind hole; 8, external spline pipe; 801, turntable; 9, internal spline pipe; 10, ring gear; 11, driving gear; 12, connecting shaft; 13, worm gear; 14, transmission gear; 15, torque gear; 16, anti-slip washer; 17, cone head; 18, driving gear; 19, sliding shaft; 20, compression spring; 21, baffle; 22, worm; 23, supporting spring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Example 1: Reference Figure 1 and Figure 2 , a patient rehabilitation exercise device, including a crutch body 2 and a truncated cone-shaped supporting component 7.

[0036] like Figure 2 and Figure 3 As shown, a shoulder rest 1 for supporting a patient is fixed on the top of the stick body 2, and an internal threaded tube 4 is detachably connected to the bottom of the stick body 2 through a connecting structure. The connecting structure includes an external threaded tube 3 sleeved on the bottom end of the stick body 2, the external threaded tube 3 is threadedly fitted in the internal threaded tube 4, and a plurality of hexagon socket bolts 301 are radially threadedly connected to the top of the external threaded tube 3, and the ends of the hexagon socket bolts 301 extend into the inside of the external threaded tube 3, and a slide rod 5 is coaxially fixed to the bottom of the internal threaded tube 4, and an annular end cap 6 is sleeved on the slide rod 5, and the end cap 6 is slidably fitted with the slide rod 5;

[0037] During assembly, the rod body 2 is inserted into the external threaded tube 3, and then the internal hexagonal bolt 301 is driven to rotate using a hexagonal wrench. After the internal hexagonal bolt 201 is tightened, the external threaded tube 3 is threadedly connected to the internal threaded tube 4.

[0038] like Figure 2 and Figure 4As shown, the support component 7 is vertically arranged, with the end with a smaller area located at the top and the end with a larger area located at the bottom. A circular anti-skid gasket 16 is fixedly connected to the lower end surface of the support component 7.

[0039] The support component 7 has a larger area and is located at the bottom. When it contacts the ground, it can increase the force-bearing area and reduce the pressure between the support component 7 and the ground to prevent the support component 7 from sinking into the ground. The presence of the anti-slip gasket 16 can prevent the support component 7 from accidentally slipping when it contacts the ground.

[0040] like Figure 5-Figure 7 As shown, a first blind hole 702 is axially opened on the upper end surface of the support component 7, the end cover 6 is threadedly fitted in the first blind hole 702, the bottom end of the slide rod 5 extends into the first blind hole 702, a turntable 801 is rotatably installed at the bottom end of the slide rod 5, and a plurality of vertically arranged compression springs 20 are distributed circumferentially in the first blind hole 702, one end of the compression spring 20 is fixedly connected to the bottom surface of the turntable 801, and the other end is fixedly connected to the bottom surface inside the first blind hole 702;

[0041] Since the shoulder support 1 supports the patient, the stick body 2 will be subjected to downward pressure, and the stick body 2 will apply downward pressure to the slide bar 5. Under the pressure, the slide bar 5 will slide downward in the end cover 6 and compress the compression spring 20.

[0042] like Figure 6 and Figure 7 As shown, a second blind hole 704 is axially opened on the lower end surface of the support component 7, a conduit 703 is fixedly connected in the second blind hole 704, the top of the conduit 703 is connected to the first blind hole 702, a conical cone head 17 is slidably fitted in the conduit 703, the small end of the cone head 17 faces downward, the inner diameter of the anti-slip gasket 16 is not less than the diameter of the cone head 17, a support spring 23 is fixedly connected to the top of the cone head 17, and the top of the support spring 23 is fixedly connected to the bottom surface of the turntable 801.

[0043] When the slide rod 5 slides downward in the end cover 6, the slide rod 5 will compress the support spring 23. At this time, the support spring 23 will apply downward pressure to the cone head 17, so that the cone head 17 applies pressure to the ground after passing through the gasket 16. Under the elastic force of the support spring 23, the pressure between the cone head 17 and the ground is slightly greater than the pressure between the support component 7 and the ground.

[0044] If the strength of the ground is not enough to support the support member 7 at this time, the cone head 17 will move downward and insert into the ground earlier than the support member 7 under the elastic force of the support spring 23.

[0045] like Figure 8-12As shown, a plurality of grooves are provided on the curved surface of the support component 7 along the generatrix direction, a plurality of baffles 21 with shapes matching the grooves are placed inside the grooves, a sliding shaft 19 is fixedly connected to the top of the baffle 21, and guide grooves 701 are provided on the inner side walls of the groove along the generatrix direction, and both ends of the sliding shaft 19 are slidably fitted in the guide grooves 701, when the cone head 17 slides down in the guide tube 703 under the elastic force of the support spring 23, the cone head 17 drives the baffle 21 to rotate through the transmission structure and causes the sliding shaft 19 to slide down in the guide groove 701, and the transmission structure corresponds to the baffle 21 one by one, and the transmission structure includes The invention comprises a torque gear 15 with a large diameter and a transmission gear 14 with a small diameter. Both the torque gear 15 and the transmission gear 14 are rotatably installed in the second blind hole 704, and the torque gear 15 and the transmission gear 14 are matched with each other. A through hole 705 is radially opened on the hole wall of the second blind hole 704. A driven rack 24 is slidably matched in the through hole 705. The driven rack 24 matches the transmission gear 14. One end of the driven rack 24 is hinged on the baffle 21 to drive the baffle 21 to rotate. An active rack 18 is vertically fixed on the cone head 17, and the active rack 18 matches the torque gear 15.

[0046] When the cone head 17 moves downward, the active rack 18 will be driven to move downward, and the downward movement of the active gear 18 will drive the torque gear 15 with a larger diameter to rotate. The rotation of the torque gear 15 will drive the transmission gear 14 to rotate, and the rotation of the transmission gear 14 will drive the driven rack 24 to move horizontally. The horizontal movement of the driven rack 24 will drive the baffle 21 to rotate with the sliding shaft 19 and move downward, so that the baffle 21 extends to the surroundings of the support component 7 for deployment. After the baffle 21 is deployed, if the support component 7 sinks to the ground at this time, the baffle 21 will increase the contact area between the support component 7 and the ground and hinder the downward movement of the support component 7, thereby preventing the stick body 2 from accidentally sinking into the ground and causing the patient to fall.

[0047] Embodiment 2: Figure 9-13 As shown, a driving structure is provided in the supporting component 7 for rotating the internal threaded tube 4 so that the internal threaded tube 4 can perform lifting movement in the external threaded tube 3, and the driving structure includes an internal spline tube 9 and a connecting shaft 12, wherein: the internal spline tube 9 is rotatably installed in the first blind hole 702, a ring gear 10 is fixedly connected to the outer wall of the internal spline tube 9, an external spline tube 8 is slidably matched inside the internal spline tube 9, and the external spline tube 8 is fixedly connected to the slide rod 5; the connecting shaft 12 is rotatably installed on the bottom surface of the first blind hole 702, a driving gear 11 is fixedly connected to the top of the connecting shaft 12, the driving gear 11 matches the ring gear 10, the bottom end of the connecting shaft 12 vertically extends to the inside of the second blind hole 704, a worm wheel 13 is fixedly connected to the bottom end of the connecting shaft 12, a worm 22 is coaxially fixedly connected to the transmission gear 14, and the worm 22 matches the worm wheel 13.

[0048] During the rotation of the transmission gear 14, the worm 22 is driven to rotate. Since the worm 22 cooperates with the worm wheel 13, the worm wheel 13 is driven to rotate during the rotation of the worm 22. The rotation of the worm wheel 13 drives the connecting shaft 12 to rotate. The rotation of the connecting shaft 12 drives the driving gear 11 to rotate. The rotation of the driving gear 11 drives the ring gear 10 to rotate. The rotation of the ring gear 10 drives the internal spline tube 9 to rotate. The rotation of the internal spline tube 9 drives the external spline tube 8 to rotate. Since the external spline tube 9 is fixed on the slide bar 9, the slide bar 5 is driven to rotate synchronously during the rotation of the external spline tube 8. The rotation of the slide bar 5 drives the internal threaded tube 4 to rotate. Since the internal threaded tube 4 is threadedly connected to the external threaded tube 3 and the external threaded tube 3 is in a fixed state, the rotation of the internal threaded tube 4 will move downward on the external threaded tube 3. The downward movement of the internal threaded tube 4 will drive the supporting component 7 to move downward, and the baffle 21 on the outer curved surface of the supporting component 7 will also contact the bottom surface earlier, thereby quickly increasing the contact area with the ground and stabilizing the rod body 2 in time.

[0049] Working principle and workflow:

[0050] When the device is in use, the shoulder support 1 supports the patient. At this time, the stick body 2 will be subjected to downward pressure, and the stick body 2 will apply downward pressure to the slide bar 5. Under the pressure, the slide bar 5 will slide downward in the end cover 6 and compress the compression spring 20.

[0051] When the slide rod 5 slides downward in the end cover 6, the slide rod 5 will compress the support spring 23. At this time, the support spring 23 will apply downward pressure to the cone head 17, so that the cone head 17 applies pressure to the ground after passing through the gasket 16. Under the elastic force of the support spring 23, the pressure between the cone head 17 and the ground is slightly greater than the pressure between the support component 7 and the ground. The cone head 17 detects the strength of the ground in advance.

[0052] If the strength of the ground is not enough to support the support member 7, the cone head 17 will move downward and insert into the ground earlier than the support member 7 under the elastic force of the support spring 23.

[0053] When the cone head 17 moves downward, the active rack 18 will be driven to move downward, and the downward movement of the active gear 18 will drive the torque gear 15 with a larger diameter to rotate. The rotation of the torque gear 15 will drive the transmission gear 14 to rotate, and the rotation of the transmission gear 14 will drive the driven rack 24 to move horizontally. The horizontal movement of the driven rack 24 will drive the baffle 21 to rotate with the sliding shaft 19 and move downward, so that the baffle 21 extends to the surroundings of the support component 7 for deployment. After the baffle 21 is deployed, if the support component 7 sinks to the ground at this time, the baffle 21 will increase the contact area between the support component 7 and the ground and hinder the downward movement of the support component 7, thereby preventing the stick body 2 from accidentally sinking into the ground and causing the patient to fall.

[0054] During the rotation of the transmission gear 14, the worm 22 is driven to rotate. Since the worm 22 cooperates with the worm wheel 13, the worm wheel 13 is driven to rotate during the rotation of the worm 22. The rotation of the worm wheel 13 drives the connecting shaft 12 to rotate. The rotation of the connecting shaft 12 drives the driving gear 11 to rotate. The rotation of the driving gear 11 drives the ring gear 10 to rotate. The rotation of the ring gear 10 drives the internal spline tube 9 to rotate. The rotation of the internal spline tube 9 drives the external spline tube 8 to rotate. Since the external spline tube 9 is fixed on the slide bar 9, the slide bar 5 is driven to rotate synchronously during the rotation of the external spline tube 8. The rotation of the slide bar 5 drives the internal threaded tube 4 to rotate. Since the internal threaded tube 4 is threadedly connected to the external threaded tube 3 and the external threaded tube 3 is in a fixed state, the rotation of the internal threaded tube 4 will move downward on the external threaded tube 3. The downward movement of the internal threaded tube 4 will drive the support component 7 to move downward, and the baffle 21 on the outer curved surface of the support component 7 will also contact with the bottom surface earlier, thereby reducing the time spent by the baffle 21 in contact with the ground, and stabilizing the rod body 2 in time.

[0055] Compared with the prior art, when the patient rehabilitation exercise equipment provided by the present invention is used in an environment where the outdoor ground strength is insufficient, the support spring 23 applies pressure to the cone head 17 to detect the strength of the ground. When it is detected that the ground strength is insufficient and there is a risk of the crutch sinking into the ground, the baffle 21 on the support component 7 will automatically unfold to increase the contact area between the crutch and the ground, thereby preventing the crutch from sinking into the ground and causing the patient to fall.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A patient rehabilitation exercise device, characterized in that: The invention comprises a crutch body (2) and a truncated cone-shaped supporting component (7), wherein: A shoulder support (1) for supporting a patient is fixed to the top of the stick body (2); an internal threaded tube (4) is detachably connected to the bottom of the stick body (2) via a connecting structure; a slide bar (5) is coaxially fixed to the bottom of the internal threaded tube (4); a circular end cover (6) is sleeved on the slide bar (5); and the end cover (6) and the slide bar (5) are slidably matched; The supporting member (7) is arranged vertically, with the end with a smaller area located at the top and the end with a larger area located at the bottom, wherein: A first blind hole (702) is axially provided on the upper end surface of the support component (7), the end cover (6) is threadedly engaged in the first blind hole (702), the bottom end of the slide rod (5) extends into the first blind hole (702), a turntable (801) is rotatably mounted on the bottom end of the slide rod (5), a plurality of vertically arranged compression springs (20) are distributed circumferentially within the first blind hole (702), one end of the compression spring (20) is fixedly connected to the bottom surface of the turntable (801), and the other end is fixedly connected to the inner bottom surface of the first blind hole (702); A second blind hole (704) is axially provided on the lower end surface of the support component (7), a guide tube (703) is fixedly connected in the second blind hole (704), the top of the guide tube (703) is communicated with the first blind hole (702), a conical cone head (17) is slidably fitted in the guide tube (703), the small end of the cone head (17) faces downward, a support spring (23) is fixedly connected to the top of the cone head (17), and the top of the support spring (23) is fixedly connected to the bottom surface of the rotating disk (801); A plurality of grooves are provided on the curved surface of the support component (7) along the generatrix direction, a plurality of baffles (21) whose shapes match the grooves are placed inside the grooves, a sliding shaft (19) is fixedly connected to the top of the baffle (21), and guide grooves (701) are provided on the inner side walls of the groove along the generatrix direction, and both ends of the sliding shaft (19) are slidably fitted in the guide grooves (701), and when the cone head (17) slides down in the guide tube (703) under the action of the elastic force of the support spring (23), the cone head (17) drives the baffle (21) to rotate through the transmission structure and causes the sliding shaft (19) to slide down in the guide groove (701).

2. The patient rehabilitation exercise equipment according to claim 1, characterized in that: A circular anti-skid washer (16) is fixedly connected to the lower end surface of the support component (7), and the inner diameter of the anti-skid washer (16) is not less than the diameter of the cone head (17).

3. The patient rehabilitation exercise equipment according to claim 1, characterized in that: When the support spring (23) is in a natural state, the bottom of the cone head (17) is higher than the bottom surface of the anti-slip washer (16).

4. The patient rehabilitation exercise equipment according to claim 1, characterized in that: The connection structure comprises an externally threaded tube (3) sleeved on the bottom end of the rod body (2), the externally threaded tube (3) being threadably fitted in the internally threaded tube (4), a plurality of internal hexagonal bolts (301) being threadably connected in a radial direction at the top of the externally threaded tube (3), the ends of the internal hexagonal bolts (301) extending into the interior of the externally threaded tube (3).

5. The patient rehabilitation exercise equipment according to claim 1, characterized in that: The transmission structure corresponds to the baffle (21) one by one, and comprises a torque gear (15) with a large diameter and a transmission gear (14) with a small diameter. Both the torque gear (15) and the transmission gear (14) are rotatably mounted in the second blind hole (704), and the torque gear (15) and the transmission gear (14) are matched with each other. A through hole (705) is radially opened on the hole wall of the second blind hole (704), and a driven rack (24) is slidably matched in the through hole (705). The driven rack (24) matches the transmission gear (14). One end of the driven rack (24) is hinged on the baffle (21) to drive the baffle (21) to rotate. An active rack (18) is vertically fixed on the cone head (17), and the active rack (18) matches the torque gear (15).

6. The patient rehabilitation exercise equipment according to claim 5, characterized in that: A driving structure is provided in the support component (7) for rotating the internally threaded tube (4) so ​​that the internally threaded tube (4) can move up and down on the externally threaded tube (3), and the driving structure comprises an internal spline tube (9) and a connecting shaft (12), wherein: The inner spline tube (9) is rotatably mounted in the first blind hole (702), a ring gear (10) is fixedly connected to the outer wall of the inner spline tube (9), an outer spline tube (8) is slidably matched inside the inner spline tube (9), and the outer spline tube (8) is fixedly connected to the slide rod (5); The connecting shaft (12) is rotatably mounted on the bottom surface of the first blind hole (702). The top of the connecting shaft (12) is fixedly connected to a driving gear (11), and the driving gear (11) matches the ring gear (10). The bottom end of the connecting shaft (12) vertically extends into the second blind hole (704). The bottom end of the connecting shaft (12) is fixedly connected to a worm wheel (13). A worm (22) is coaxially fixedly connected to the transmission gear (14), and the worm (22) matches the worm wheel (13).

Images